Triathlon, one of the fastest growing sports in the U.S., is sponsored by USA Triathlon which currently has more than 500,000 members.

The Age Group Nationals includes two events. The Olympic Distance event consists of a 1500 meter swim, a 40 kilometer bike ride, and a 10 kilometer run; the Sprint event consists of a 750 meter swim, a 20 kilometer bike ride, and a 5 kilometer run.